| Summary: | In the organic, biological-dynamical cultivation in unheated plastichouse tomato cultivars, hybrid and landraces were studied in comparison with the open field production. The average total yield was 74 % higher and the average marketable yield 182 % higher in the plastichouse than in the open field. The lowest total and marketable yield was obtained from cv. Marmande and cv. San Marzano. There is no substantial difference in the marketable yield between the hybrid Arletta, landrace Milka and landrace Maribor. By the same planting date in the plastichouse, the harvesting time was prolonged in comparison to the open field cultivation for 48 days for hybrid Arletta. Landraces Milka and Maribor had only 5 to 6 % of total and 2% of marketable yield in October, but cv. San Marzano yielded 30 % of total and 27 % of marketable yield in October when cultivated in an unheated plastichouse. Landrace Milka and landrace Maribor had more cracked fruits than hybrid Arletta. The weight of average marketable fruits was the lowest with cv. San Marzano, followed by hybrid Arletta and landrace Milka. Cultivar Marmande and landrace Maribor had marketable fruits over 200 g.
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